An Isoreticular Series of Zinc(II) Metal–Organic\nFrameworks Derived from Terpyridylcarboxylate Ligands

Abstract

An isoreticular family\nof seven microporous metal–organic frameworks of the general\nform [Zn<b>L</b>] have been synthesized, where <b>L</b> is a 4′-substituted 2,2′:6′,2″-terpyridine-4,4″-dicarboxylate\nligand. Each framework adopts an interpenetrated zeolitic gismondine\n(<b>gis-c</b>) topology and possesses one-dimensional square\nchannels with ca. 9.0 Å apertures running down the crystallographic <i>c</i> axis. Gas adsorption measurements with N₂,\nH₂, CH₄, and CO₂ confirm their permanent\nporosity. The ligand functional groups, which include phenyl, 2-tolyl,\n4-chlorophenyl, 4-nitrophenyl, 2-thienyl, 3-thienyl, and 4-pyridyl,\nline the channel walls and tune the gas adsorption properties of these\nmaterials.